1997-2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

Crank but no start

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Old 05-01-2024, 12:50 PM
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Crank but no start

The saga continues. I talked to an auto electric shop about my '04 not starting. They told me to call a local lock smith who is good with the newer electronic equipment. Everything is working, with the exception of no communication in the system. My keys are good, anti-theft isn't tripped and so on. I've got good fuel pressure. He was unable to talk through the OBD port as there was no communication. His $6000 scanner couldn't talk to it. My Fairly deluxe $400 scanner can't read it. My older, cheapie $75 scanner WILL talk to the system, but can't find anything wrong.

I'm going to trace the OBD port wiring to see if there is anything loose before I tow it to an electric shop.
 
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Old 05-03-2024, 08:44 PM
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I've tracked down 2 anomalies on my truck. No communication with the computer via the OBDII port and low battery pack voltage. That last one is puzzling as my battery is fully charged and holding steady at 12.6 volts. The shop will take the truck in on the 14th so I'm going to see if there is a bad ground somewhere slowing voltage transfer.

Any suggestion on what to look for is welcome.
 
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Old 05-06-2024, 12:12 PM
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Check for fuel pressure yet? How about injector pulse? Coil pulse?

Cheap noid light kit will do two of those.
 
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Old 05-06-2024, 05:59 PM
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Originally Posted by Hit Man X
Check for fuel pressure yet? How about injector pulse? Coil pulse?

Cheap noid light kit will do two of those.

All me or the lock smith can figure out is there is no communication between the reader port and the computer. I've checked the port as best I can. Tomorrow, between the rains, I'll pull the computer and see if any pins are bent.

Plenty of fuel pressure. No problem there. I've had the dash cluster and computer checked and the fuse block rebuilt.
 
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